1320044043320 has 64 divisors (see below), whose sum is σ = 3128870656800. Its totient is φ = 499835128320.

The previous prime is 1320044043317. The next prime is 1320044043323. The reversal of 1320044043320 is 233404400231.

It is an interprime number because it is at equal distance from previous prime (1320044043317) and next prime (1320044043323).

It is a super-2 number, since 2×1320044043320² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1320044043320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320044043323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 290450 + ... + 1650590.

Almost surely, 2^{1320044043320} is an apocalyptic number.

1320044043320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1320044043320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1564435328400).

1320044043320 is an abundant number, since it is smaller than the sum of its proper divisors (1808826613480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1320044043320 is a wasteful number, since it uses less digits than its factorization.

1320044043320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1361448 (or 1361444 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 1320044043320 its reverse (233404400231), we get a palindrome (1553448443551).

The spelling of 1320044043320 in words is "one trillion, three hundred twenty billion, forty-four million, forty-three thousand, three hundred twenty".